[Bug 91393] New: N133HSE-EA3 Laptop Screen Flickering

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91393

            Bug ID: 91393
           Summary: N133HSE-EA3 Laptop Screen Flickering
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: furniss.tom at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 117243
  --> https://bugs.freedesktop.org/attachment.cgi?id=117243&action=edit
dmesg

Consistently flickering screen when i915 driver is used with the N133HSE-EA3
screen of the Lafite 13.3 laptop.  Video here:
https://www.youtube.com/watch?v=0ISthkP7L3o

When i915 driver is disabled (i915.modeset=0), Linux falls back to the vesa
driver and the laptop screen renders correctly.

When an external monitor is connected via HDMI, the i915 driver renders the
external monitor correctly whilst the flickering remains on the laptop screen.

Earlier versions of this laptop model did not experience this problem, but the
most recent version does (reported by one other user).  I have no authoritative
record of the hardware changes between model versions.

System information:
 - Architecture and kernel: 4.2.0-994-generic #201507142205 SMP Wed Jul 15
02:06:50 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
 - Distribution: Ubuntu 15.04
 - Laptop model: Lafite 13.3 from www.pcspecialist.co.uk
 - Laptop Screen: Chimei N133HSE-EA3
 - Display Conenctor: eDP


$ sudo get-edid | edid-decode
Extracted contents:
header:          00 ff ff ff ff ff ff 00
serial number:   0d ae 61 13 00 00 00 00 07 18
version:         01 04
basic params:    a5 1d 11 78 02
chroma info:     ce 85 a3 57 4e 9d 26 12 50 54
established:     00 00 00
standard:        01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01
descriptor 1:    36 36 80 a0 70 38 20 40 2e 1e 24 00 25 a5 10 00 00 18
descriptor 2:    24 24 80 a0 70 38 20 40 2e 1e 24 00 25 a5 10 00 00 18
descriptor 3:    00 00 00 fe 00 43 4d 4e 0a 20 20 20 20 20 20 20 20 20
descriptor 4:    00 00 00 fe 00 4e 31 33 33 48 53 45 2d 45 41 33 0a 20
extensions:      00
checksum:        a1

Manufacturer: CMN Model 1361 Serial Number 0
Made week 7 of 2014
EDID version: 1.4
Digital display
8 bits per primary color channel
DisplayPort interface
Maximum image size: 29 cm x 17 cm
Gamma: 2.20
Supported color formats: RGB 4:4:4
First detailed timing is preferred timing
Established timings supported:
Standard timings supported:
Detailed mode: Clock 138.780 MHz, 293 mm x 165 mm
               1920 1966 1996 2080 hborder 0
               1080 1082 1086 1112 vborder 0
               -hsync -vsync
Detailed mode: Clock 92.520 MHz, 293 mm x 165 mm
               1920 1966 1996 2080 hborder 0
               1080 1082 1086 1112 vborder 0
               -hsync -vsync
ASCII string: CMN
         ASCII string: N133HSE-EA3
 Checksum: 0xa1
EDID block does NOT conform to EDID 1.3!
    Missing name descriptor
    Missing monitor ranges



$ sudo lshw -c video
  *-display
       description: VGA compatible controller
       product: Broadwell-U Integrated Graphics
       vendor: Intel Corporation
       physical id: 2
       bus info: pci at 0000:00:02.0
       version: 09
       width: 64 bits
       clock: 33MHz
       capabilities: msi pm vga_controller bus_master cap_list rom
       configuration: driver=i915 latency=0
       resources: irq:50 memory:b1000000-b1ffffff memory:c0000000-cfffffff
ioport:4000(size=64)




$ glxinfo | grep -i vendor
server glx vendor string: SGI
client glx vendor string: Mesa Project and SGI
OpenGL vendor string: Intel Open Source Technology Center



$ glxinfo | grep -i render
direct rendering: Yes
    GLX_MESA_multithread_makecurrent, GLX_MESA_query_renderer, 
    GLX_MESA_multithread_makecurrent, GLX_MESA_query_renderer, 
OpenGL renderer string: Mesa DRI Intel(R) HD Graphics 5500 (Broadwell GT2) 
    GL_ARB_conditional_render_inverted, GL_ARB_conservative_depth, 
    GL_MESA_texture_signed_rgba, GL_NV_conditional_render, GL_NV_depth_clamp, 
    GL_ARB_conditional_render_inverted, GL_ARB_conservative_depth, 
    GL_NV_conditional_render, GL_NV_depth_clamp, GL_NV_light_max_exponent, 
    GL_OES_element_index_uint, GL_OES_fbo_render_mipmap,

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